Boat-propeller.



j A. L. GREEN.

- r I BOAT PROPELLBR. v grrnmumn FILED AUG.21, 1912.

. I Patented Feb. 25, 1913.

2 SHEETS-8321111.

amen/tea Andrew L. Green y Y A.- L. GREEN BOAT IEROPELLBR.

' ugmouron FILED mam, 1912. 1,054,531.-

, I v Patented Feb. 25, 1913.

wuewtoz Andrew L. Green wiwlmeooo 2 8HEETSBHEET 2..

"ran his ANDREW Ir. GREEN, OF AMERICUS', GEORGIA.

BOAT-PROPELLER.

To all 'wfwm it may concern:

. Be it known that I, ANDREW L. GREEN,a citizen of the United States, residing at Americns, in the county of Sumter and State of Georgia, have invented new and useful Improvements in Boat-Propellers, of which the following is a specification.

The general object of this invention is the provision of a propelling mechanism for floating crafts, said mechanism comprising means adapted to be connected to a reciprocat-in drive shaft and comprising .a "plurality o propelling blades which are mounted in such a manner as to obtain the greatest amount of force when propelling in on'edirection and-the least amount of resistance when traveling in the other direction.

In carrying out the object of the invention generally stated above, it will be understood, of course, that the essential features thereof are susceptible to changes in details and structural arrangements, one preferred and practical embodiment being shown in the accompanying drawing, wherein:-

Figure l is a fragmentary side elevation ofa portion of the hull of a ship, showing the mechanism applied thereto and constructed in accordance with the invention. Fig. 2 is a transverse section of the hull of a ship showing the propelling mechanism in front elevation. Fig. 3 is a detail top plan view of a supporting element used in connection with the invention. Fig. 4; is a fragmentary longitudinal sectional viewthrough a portion of the crank shaft with one of the propelling blades connected thereto and showing the manner of lubricating the parts. Fig. 5 is a detail perspective view of one of the propelling blades with the parts connected thereto. Fig. 6 is a section on the line 6-6 of Fig. 4. Fig. 7 is a section on the line 7-7 of Fig. 6.

In the drawings, 10 indicates the hull of a ship and'10 the ribs thereof, Certain of the ribs adjacent'the stern ofthe ship are adapted to engage substantially U-shaped brackets 12 which are formed upon the supporting element 13, thereby securing said element in position. One end of each of the supporting elements 13 extends exteriorly of the hull 10 and is provided with a palr of diverging arms 16 which are bent into substantially U-shaped portions 17 at their outer ends for a purpose which will pres- Specification of Zetters Patent. s atches med-au ust 21, 1912. Serial 1%. 716,326.

. scribed.

ently appear.

Patented Feb. 25, 1913.

Mounted in the stern of the hull 10 transversely thereof is a crank shaft 18 which is supported in suitable bearings 19, said bear- "lngs being mounted in oppositely disposed openings formedin the sides of the hull. Interiorly of the hull 10, the crank shaft 18 has secured thereto a suitable lubricant containing reservoir 20 from which a lubricant is adapted to be fed to the crank shaft through a feed channel 21 formed therein. The feed channel 21 extends longitudinally throughout the entire length of the crank shaft 18 and is adapted to communicate with certain parts .which will be presently de- The crankshaft is adapted to have connected thereto a plurality of propellin U- shaped blades 22 and as all of these b ades are mounted in a similar manner, a description of one will suffice. At certain intervals the crank shaft 18 is provided with spacedcollars 23 which are adapted to receive therebetween the bifurcated ends of the supporting arms 24, said arms being arranged in pairs and having the blades 22 secured thereto in any preferred manner. Between-the collars 23 the crank shaft 18 is provided with a lateral passage 25 which communicates with a peripheral groove 26 so that lubricant from the crank shaft may be fed to the bearing blocks 27 which engage each side of the crankshaft in the bifurcated end of the arm 24, said blocks forming bearings for said shaft. The inner block 27 is provided with a passage which is in alinement with a passage 28 extending longitudinally through the arm 24:, the inner end of which is provided with a transverse opening 29 adapted td' receive one end of a stationary stub shaft 30. The two supportingarms. 24 whichform the support for each of the blades 22 converge so that their inner 'ends' will abut the collar 31 formed upon the stub shaft 30. Said shaft is provided with a longitudinal opening 32 therethrough which 100 communicates with the assage 28 formed in each of the arms 24 an the opening in said shaft communicates with a peripheral groove 33 formed upon the collar- 31 whereby the end of the arcuate oscillating hanger 105 arm 34 which loosely engages said collardaetween the arms 24 is lubricated.

The U-shaped portions 17 of the support-- ing element 13 are provided with transverse openings, each portion being adapted to re- 10 1 ceive a stub shaft in the openings therein, said shaft being provided with a collar 36 which engages an opening formed adjacent the other end of the hanger arm 34. The collar 36 is provided with a peripheral groove which communicates with the passage in the hanger arm whereby the lubricant flowing therethrough will be fed to said collar for lubricating the pivotal connection between said hanger arm and the shaft 35. A reciprocating drive shaft 37 is suitably mounted interiorly of the hull l0 and has one end thereof connected to the crank shaft 18 and ,the other end connected to a suitable engine (not shown.) It will thus be seen that upon the reciprocation of the drive shaft 37, the crank shaft 18 will be caused to rotate and through the connections between said. crank shaft and the supporting elements 13 the propelling blades Qil'will have a motionimparted thereto whereby the ship will be propelled forwardly. It will be seen that by reason bf the connections above mentioned when the plates 22, are moving re'arwardly the faces thereof will be in' a substantially vertical position thus obtaining the maximum amount of propelling force. When the blades are in their lowermost position .on the return movement the same are substantially parallel with the surface of the water I elements.

that which propels the boat in a forward direction.

What is claimed as new is 1. In a device of the class described, the combination with the hull of a boat, of supporting elements secured to said hull on each side of the keel thereof, a propelling mechanism mounted in said hull and pivotally connected to said supporting elements, said propelling mechanism comprising a plurality of blades, and an oscillating connection between said porting elements.

2. In a device of the class described, the combination with the hull of a boat, of supporting elements secured to said hull on each side of the keel thereof, a propelling mechanism mounted in said hull and pivotally connected to said supporting elements,.said propelling mechanism comprising a plurality of blades, an oscillating connection between said blades and said supporting'elements, andmeans carried by said propelling mechanism for lubricating the connections between the blades and said supporting In testimony whereof ,I- affix my signature in presence of two witnesses. 1

-VVitnesses; J

WILLIAM Jones, I G. W. F. PHILLIPS. 4

Copies of this patent may be obtained for five cents each, by addressing the (lommissioner of Patents I Washington, 11.0. l

blades and said su'p--' c0 ANDREW LQGRE EN; j 

